Just because your network is "UP," doesn't mean it's working well!
Intermittent network issues frustrate users, affect business productivity, and are a nightmare for all IT administrators because they are the most difficult to solve.
Network issues like choppy VoIP, jerky video calls, and network and application slowness issues can affect your business in drastic ways - which is why it's important to know how to identify network issues so you can solve them quickly.
Measure Network Metrics:
Knowing how to identify network issues begins with measuring network performance using precise network metrics. You'll then need to familiarize yourself with all your application performance requirements to identify the network performance thresholds to be respected and to ensure that these applications can work properly.
Some of the most common network metrics that you should be looking at are:
A. Latency:
Within a network infrastructure, latency refers to the measure of time it takes for data packets to reach their destination when traveling across a network. It is usually measured as a round trip delay, in milliseconds (ms), taking into account the time it takes for the data to get to its destination and then back again to its source.
B. Jitter:
Jitter is a huge problem when using real-time applications such as unified communications, including IP telephony, video conferencing, and virtual desktop infrastructure. Simply put, jitter is a variation in delay. Otherwise known as a disruption that occurs while data packets travel across the network.
C. Packet Loss:
Packet loss refers to the number of data packets that were successfully sent out from one point in a network, but was dropped during data transmission and never reached their destination. It’s important to know how many packets are being dropped across your network to determine good or poor network performance.
D. Throughput:
Throughput refers to the amount of data passing through a network and traveling from point A to point B in a determined amount of time. When referring to communication networks, throughput is the rate of data that was successfully delivered over a communication channel.
E. Packet Duplication:
Packet duplication refers to when data packets are duplicated somewhere in the network and are then received twice at their destination. The source of the data sometimes believes that a data packet was not transmitted correctly because of packet loss, and may retransmit that packet. The destination source may have already gotten the first packet and will receive a second duplicate packet.
F. Packet Reordering:
Packet reordering occurs when data packets arrive at their destination in the wrong order. This can happen for various reasons, such as multipath routing, route fluttering, and wrong QoS queue configuration.
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https://www.dnsstuff.com/
https://www.researchgate.net/
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